Built-in dual antennas 80M long-distance transmission, using 2.4GHz wireless transmission technology, stable signal transmission, high-definition audio transmission.<br> Large-capacity battery and long-lasting. Using a 18650 lithium battery with a capacity of 900MAH and replaceable USB data cable for power supply. It can be used for 6-8 hours when fully .<br> 48KHZ sampling rate, high-fidelity reproduction of timbre, high-performance decoding chip, dynamic range signal-to-noise ratio 110DB, accurate restoration of sound details.<br> L-shaped connector, L-shaped connector, compact and space-saving, more convenient to use.<br> Smart compatible multi-device connections,Easy and convenient to use, enjoy the fun of wireless transmission.<br> Type:B:One for two<br> Colour:Black<br> Material:Metal<br> Package Contents:<br> 2 * Microphone Transmitter Receiver<br> 1 * Microphone Receiver<br> 3 * Adapter<br> 1 * USB Cable<br> Only the above package content, other products are not included.<br> Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.